Multiple choice

Two bikers A and B start at the same time and ride at 75 km/hr and 60 km/hr respectively towards each other. They meet after 20 minutes. How far (in km) were they from each other when they started?

  1. 42

  2. 48

  3. 50

  4. 46

  5. None of these
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Distance = (75 + 60) x (20/60) = 135 x 1/3 = 45 km. Using relative speed 135 km/h for 20 minutes gives 45 km. The bikers approach each other, so their speeds add. Time must be converted to hours.

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